U.S. patents covering time keeping mechanisms (1892)
United States. Patent Office · [Washington : United States Patent Office] · leaf 73
e-tent, and an adjustable extension on said le-ver, which, presents a contact to the main-spring which is under control of the operator, 95whereby the point of expansion of the spring at which the detent will be withdrawn is un-der control, substantially as described. In testimony whereof I affix… … TTvi/eTvtbr-, tyc/to.t?^ ^s?6di/. *No Model. M. MARTIN. WORKMANS TIME RECORDER. 2 Sheets—Sheet 2. No. 475,458, Patented May 24, 1892. ri3 .3.
Clocks and watches
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
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